Visual tapping detection equipment for vehicle lamp assembly

Abstract

The invention relates to the technical field of product detection, and particularly discloses visual tapping detection equipment for a vehicle lamp assembly. An image recognition mechanism; the auxiliary detection mechanism comprises a mounting plate, a screwing assembly, a driving assembly and an abutting assembly; the screwing assembly comprises a rotating disc, a connecting rod and a detection screw rod, the rotating disc is rotationally connected to the mounting plate, the connecting rod coaxially penetrates through the rotating disc in a sliding mode, and the detection screw rod is coaxially arranged at the end of the connecting rod; the driving assembly is used for driving the turntable to rotate; the abutting assembly is arranged at the end of the connecting rod. Visual identification detection can be carried out on the threaded hole in the workpiece so as to preliminarily judge whether the situation that threads are missed to be machined exists or not; and if no leakage exists, the thread form in the thread can be further detected through the auxiliary detection mechanism, so that the workpiece with the defect in the threaded hole is picked out, and the subsequent normal assembly can be ensured.

Description

Technical Field

[0001] This application relates to the field of product testing technology, and in particular to a visual inspection device for automotive lighting components. Background Technology

[0002] Some parts in automotive lighting assemblies are assembled using riveting. During assembly, due to product requirements, multiple threaded holes are provided in different locations. Often, it is only after assembly that it is discovered that the diameter of the threaded holes is unsuitable, or that some holes are not tapped, which affects subsequent assembly processes. To prevent defective products from entering later stages, each assembled product needs to be inspected to determine whether the machining of the threaded holes meets the requirements; therefore, an inspection device is needed. Summary of the Invention

[0003] To facilitate the inspection of whether the threaded holes on automotive lighting components meet the requirements, this application provides a visual tapping inspection device for automotive lighting components.

[0004] The visual inspection device for automotive lighting components provided in this application adopts the following technical solution: A visual inspection device for automotive lighting components includes a base and a positioning mechanism disposed on the base for fixing the workpiece; Image recognition mechanism used to detect threaded holes on workpieces; The auxiliary testing mechanism includes a mounting plate, a screw-in assembly, a drive assembly, a connecting assembly, and a pressing assembly; The engagement assembly includes a turntable, a connecting rod, and a detection screw. The turntable is rotatably connected to the mounting plate. The connecting rod is slidably inserted coaxially through the turntable. The detection screw is coaxially disposed at the end of the connecting rod, so that the turntable can drive the connecting rod and the detection screw to rotate in the same direction, and cause the detection screw to be screwed into the threaded hole to be tested on the workpiece. The drive component is used to drive the turntable to rotate; The connecting component is disposed between the connecting rod and the detection screw, so that when the detection screw and the threaded hole to be tested are normally engaged, the connecting rod and the detection screw rotate in the same direction and remain relatively stationary; when the detection screw cannot be screwed into the threaded hole to be tested, the connecting rod rotates relative to the detection screw. The pressure-reducing component is used to drive the detection screw to slide towards the side of the threaded hole to be tested.

[0005] By adopting the above technical solution, the positioning mechanism can fix the workpiece, and the image recognition mechanism can detect the threaded hole on the workpiece to quickly determine whether there is a thread in the threaded hole. If there is a thread in the hole, the auxiliary detection mechanism can further test the internal thread by trial tightening. The pressing component drives the detection screw to press against the open end of the threaded hole to be tested through the connecting rod, and the driving component drives the turntable to rotate. The turntable drives the detection screw to rotate through the connecting rod. If the detection screw can be screwed in smoothly, it indicates that the threaded hole meets the requirements and can be assembled normally. If the detection screw cannot be screwed in smoothly, it indicates that the threaded hole has a defect, which affects the subsequent assembly. This workpiece needs to be picked out for repair or scrapping. The detection method of trial tightening the detection screw can be applied to threaded holes of different depths, making it more applicable. The above mechanisms work together to achieve rapid detection of threaded holes on workpieces, thereby quickly picking out defective products from a large batch of products to ensure product quality.

[0006] Optionally, multiple sets of engagement components are provided, each engagement component corresponding to a threaded hole to be tested. The drive component includes a driving sprocket, a driven sprocket, a transmission sprocket, a chain, and a motor. The chain is wound between the driving sprocket and the driven sprocket. The output shaft of the motor is coaxially connected to the driving sprocket. The number of transmission sprockets is the same as the number of engagement components. Each transmission sprocket corresponds to one engagement component. The transmission sprocket is located inside the chain and meshes with the chain. The transmission sprocket is coaxially fixedly connected to the turntable.

[0007] By adopting the above technical solution, with the cooperation of the driving sprocket and the driven sprocket, the motor can drive the chain to rotate after starting, thereby causing multiple transmission sprockets to rotate. The transmission sprockets drive the turntable to rotate, thereby realizing the synchronous drive of multiple turntables. Thus, it is possible to detect multiple threaded holes to be tested at the same time, improving the detection efficiency.

[0008] Optionally, the connecting assembly includes a mounting block, a support rod, an adjusting rod, a first spring, a stop block, and a push rod. The mounting block is fixedly disposed at the end of the detection screw. The support rod is radially disposed along the mounting block and slidably connected to the mounting block along the outer wall of the mounting block. The mounting block has a cavity inside. One end of the connecting rod passes through the interior of the mounting block, and the push rod is fixedly connected to the end of the connecting rod that passes through the interior of the mounting block. One end of the support rod is located inside the mounting block and is used to abut against the push rod. The other end of the support rod is located outside the mounting block. The adjusting rod and the stop block are both disposed outside the mounting block. The first spring is connected between the adjusting rod and the support rod, and the first spring causes the support rod to abut against the stop block.

[0009] By adopting the above technical solution, when there is a defect such as skewed thread hole or non-standard thread profile, after the end of the testing screw is partially screwed into the thread hole, the end of the testing screw gets stuck in the thread hole and cannot be screwed in further. At this time, the rotation of the push rod can drive the support rod to move, so that the first spring is further compressed until the push rod passes the support rod. Then, the support rod slides to avoid the push rod under the action of the first spring. That is, the connecting rod and the push rod continue to rotate, while the testing screw remains stationary. This can prevent the continuous application of force to the screw, which would overload the motor, and can also prevent damage to the thread profile of the testing screw, thereby ensuring the subsequent testing effect. When this phenomenon occurs, it indicates that there is a defect in the thread hole on the workpiece. At this time, the output shaft of the motor rotates in the opposite direction, which causes the connecting rod and the push rod to rotate in the opposite direction. Since the support rod is pressed against the stop block, the push rod can push the mounting block to rotate through the support rod, thereby driving the testing screw to rotate and unscrew the testing screw out of the thread hole.

[0010] Optionally, the adjusting rod is slidably connected to the outside of the mounting block along the sliding direction of the support rod, and an adjusting bolt is rotatably connected to the stop block. The adjusting bolt is set along the sliding direction of the support rod and is threadedly connected to the adjusting rod.

[0011] By adopting the above technical solution, rotating the adjusting bolt can drive the adjusting rod to slide, thereby changing the distance between the adjusting rod and the support rod, which changes the compression of the first spring, thereby adjusting the elastic force applied by the first spring to the support rod. Therefore, this elastic force can be adjusted according to the tightening torque of the detection screw, making it more widely applicable.

[0012] Optionally, the detection screw and the mounting block are detachably connected.

[0013] By adopting the above technical solution, it is easy to replace the detection screw of different sizes according to the threaded hole on the workpiece, so that the equipment can be used to detect different types of workpieces, making it more versatile.

[0014] Optionally, the pressing assembly includes a first power telescopic member, a connecting plate, a sleeve, and a second spring. The connecting plate is connected to the movable end of the first power telescopic member, and the sleeve is connected to the connecting plate. The number of sleeves is the same as the number of connecting rods, and each sleeve corresponds to one connecting rod. The second spring is disposed inside the sleeve, and one end of the second spring is provided with a connecting block. The connecting block is rotatably connected to the connecting rod, and the other end of the second spring is connected to the sleeve.

[0015] By adopting the above technical solution, when the movable end of the first power telescopic component extends, the connecting plate and the sleeve can move towards the side closer to the workpiece. The sleeve drives the detection screw to move through the second spring until the end of the detection screw abuts against the end of the threaded hole to be tested on the workpiece. Then the sleeve continues to move, which compresses the second spring, thereby pressing the end of the detection screw against the end of the threaded hole to be tested. Then the detection screw rotates and can be screwed into the threaded hole to be tested. Therefore, the setting of the pressing component can press the end of the detection screw against the open end of the threaded hole to be tested on the workpiece, preventing the detection screw from rotating in place, facilitating the smooth screwing in, and ensuring the smooth progress of the testing process. Since the connecting block at the end of the second spring is rotatably connected to the connecting rod, the rotation of the connecting rod will not drive the second spring to rotate, thereby preventing the second spring from being subjected to large torsion and ensuring the working effect of the second spring.

[0016] Optionally, the end of the sleeve away from the connecting plate is slidably sleeved on the outside of the connecting rod, and the end of the sleeve away from the connecting plate is provided with a disc spring, which is sleeved on the outside of the connecting rod. The end of the connecting rod located inside the sleeve is provided with a connecting plate that abuts against the inner wall of the sleeve, and the disc spring is used to abut against the connecting plate.

[0017] By adopting the above technical solution, when the end of the testing screw is screwed into the threaded hole to be tested on the workpiece, the movable end of the first power telescopic component retracts, causing the connecting plate to drive the sleeve to move away from the workpiece until the disc spring at the end of the sleeve abuts against the connecting plate at the end of the connecting rod. Then, the sleeve continues to move, which compresses the disc spring. At this time, a large force can be applied to the connecting rod, thereby applying a large force to the testing screw to detect whether the threaded engagement part meets the requirements. This operation further realizes the detection of the internal thread of the threaded hole to be tested, so as to ensure the accuracy of the detection results. Because a disc spring is provided, compared with a rigid connection, it can reduce the damage to the first power telescopic component while ensuring that a large tension is applied to the testing screw, thereby ensuring service life. After the outward pulling test is completed, the first power telescopic component drives the sleeve to move a small distance closer to the workpiece, thereby restoring the disc spring to its initial state. Therefore, in this state, the testing screw will not be subjected to large pressure or tension, and the testing screw can be smoothly unscrewed from the threaded hole to be tested. This also reduces the wear on the testing screw during the unscrewing process, ensuring the normal use of the testing screw and extending its service life.

[0018] Optionally, each of the connecting rods is provided with an identifier at the same position.

[0019] By adopting the above technical solution, when multiple testing screws can rotate synchronously and screw into the corresponding threaded holes to be tested, the multiple marking pieces are on the same straight line. Therefore, observing this phenomenon indicates that the multiple threaded holes to be tested meet the requirements. When one of the threaded holes to be tested has a problem, the testing screw corresponding to this threaded hole cannot be screwed in smoothly. Therefore, this testing screw will rotate in place, causing the multiple marking pieces to not be on the same straight line. Therefore, observing this phenomenon indicates that a certain threaded hole to be tested has a defect. Thus, the setting of marking pieces makes it easier for operators to quickly observe the test results, which is more convenient.

[0020] Optionally, a mounting base is slidably disposed on the mounting plate in a direction parallel to its own surface, and a first locking bolt for locking the mounting base is provided on the mounting base; a lifting block is slidably disposed in the mounting base in its own height direction, and a second locking bolt for locking the lifting block is provided on the mounting base; the turntable, the driving sprocket and the driven sprocket are all rotatably connected to the lifting block.

[0021] By adopting the above technical solution, the horizontal installation position and vertical installation height of the mounting base can be adjusted, thus allowing the positions of the drive sprocket, driven sprocket and turntable to be adjusted as needed, thereby adapting to workpieces with different thread hole positions and making it more versatile.

[0022] Optionally, the positioning mechanism includes two second power telescopic members located in the same straight line direction, with the movable ends of the two second power telescopic members facing each other.

[0023] By adopting the above technical solution, after the workpiece is placed on the base, the piston rods of the two second power telescopic components extend toward the side that is close to each other, thereby clamping and fixing the workpiece. Thus, the position of the workpiece can be fixed, which can improve the stability of the subsequent testing process.

[0024] In summary, this application includes the following beneficial technical effects: 1. First, visual inspection is performed using an image recognition mechanism to determine if there are any omissions in the threaded hole. If there are omissions, no further inspection is needed, and the workpiece can be directly removed to ensure inspection efficiency. If there are no omissions, an auxiliary inspection mechanism can be used to perform auxiliary inspection on the threads inside the threaded hole to further determine whether the thread profile meets the subsequent assembly requirements.

[0025] 2. When the auxiliary testing mechanism is working, multiple testing screws can test simultaneously, which helps to improve testing efficiency. Multiple testing screws rotate synchronously. If multiple testing screws are screwed in simultaneously, and the testing screws remain stationary when the subsequent pressure assembly stops applying pressure, it indicates that the threaded hole on the workpiece meets the requirements. Therefore, it is convenient to quickly determine whether the internal tooth profile of the threaded hole on the workpiece meets the subsequent assembly requirements. The above mechanism mainly achieves the detection of the internal tooth profile of the threaded hole through the cooperation of various parts, without the need for torque sensors or high-end testing equipment. Therefore, while ensuring testing accuracy, it helps to reduce the cost of testing equipment.

[0026] 3. When there is a defect in the tooth profile inside the threaded hole to be tested, the end of the testing screw cannot be screwed in further after being screwed in a part. At this time, relative rotation can occur between the connecting rod and the testing screw, thereby avoiding motor overload and preventing the testing screw from being subjected to excessive force, reducing the wear on the testing screw, and thus ensuring the subsequent testing effect.

[0027] 4. When the sleeve moves closer to the workpiece, it applies pressure to the testing screw via the second spring, pressing the end of the testing screw against the open end of the threaded hole to be tested on the workpiece. This ensures that the testing screw can be smoothly screwed into the threaded hole, thus guaranteeing the smooth progress of the testing process. When the sleeve moves away from the workpiece, it applies tension to the connecting rod, thereby verifying the connection effect between the testing screw and the threaded hole to be tested. This allows for further testing of the threaded hole to ensure the accuracy of the test results. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the embodiment of this application with the image recognition mechanism hidden; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view along the axis of the detection screw in an embodiment of this application; Figure 5 yes Figure 4 Enlarged view of point B in the middle; Figure 6 yes Figure 4 Enlarged view of point C in the middle; Figure 7 This is a cross-sectional view used to illustrate the connecting components in this application embodiment; Figure 8 yes Figure 7 Enlarged diagram of point D in the middle.

[0029] Reference numerals: 1. Base; 2. Positioning mechanism; 21. Second power telescopic component; 22. Clamping block; 3. Image recognition mechanism; 4. Mounting plate; 5. Engaging assembly; 51. Turntable; 511. Slot; 52. Connecting rod; 521. Limiting plate; 522. Connecting plate; 5221. Rotating slot; 53. Detection screw; 531. Connecting piece; 6. Drive assembly; 61. Drive sprocket; 62. Driven sprocket; 63. Transmission sprocket; 64. Chain; 65. Motor; 7. Connecting assembly; 71. Mounting block; 72. Support rod; 73. Adjusting rod; 74. First spring; 75. 751. Stop block; 76. Adjusting bolt; 8. Push rod; 9. Pressing assembly; 10. First power telescopic component; 11. Connecting plate; 12. Sleeve; 13. Disc spring; 14. Second spring; 15. Connecting block; 16. Rotating block; 17. Marking component; 18. First locking bolt; 19. Lifting block; 10. Second locking bolt; 10. Pressing mechanism; 11. Third power telescopic component; 12. Pressure plate; 13. Pressure block; 14. Protrusion; 15. Slide groove; 16. Guide rod; 20. Workpiece. Detailed Implementation

[0030] The following combination Figures 1-8 This application will be described in further detail.

[0031] This application discloses a visual tapping inspection device for automotive headlight assemblies. This embodiment uses an example of a workpiece with three threaded holes for illustration. (Refer to...) Figure 1 and Figure 2 The visual tapping inspection equipment for automotive headlight components includes a base 1, a positioning mechanism 2, an image recognition mechanism 3, and an auxiliary inspection mechanism. The positioning mechanism 2 fixes the workpiece 20 to be inspected. Then, the image recognition mechanism 3 identifies the threaded holes on the workpiece 20 to determine if any un-tapping is present. When an un-tapping is detected, the workpiece 20 is directly removed. When a thread is detected, the auxiliary inspection mechanism further inspects the thread profile inside the hole to determine if it meets subsequent assembly requirements. Removing problematic workpieces 20 ensures product quality and guarantees proper subsequent assembly.

[0032] Reference Figure 2The positioning mechanism 2 includes a second power telescopic component 21, which is a cylinder. Two second power telescopic components 21 are provided, located in the same straight line, with the piston rod ends of the two components facing towards each other. Each piston rod end of the two second power telescopic components 21 is fixedly connected to a clamping block 22, which abuts against the workpiece 20. Therefore, after the workpiece 20 is placed on the base 1, the two second power telescopic components 21 respectively drive the two clamping blocks 22 to abut against both sides of the workpiece 20, thus fixing the position of the workpiece 20 and ensuring the stability of the subsequent inspection process.

[0033] Reference Figure 1 The image recognition mechanism 3 includes an industrial camera and an image processing system. The lens of the industrial camera is aimed at the threaded hole to be tested on the workpiece 20 placed on the base 1, and can clearly capture images of the threaded hole on the workpiece 20. The image processing system can analyze and process the captured images to determine whether there are any missing threads in the threaded hole, and to preliminarily determine whether the size and shape of the threaded hole meet the requirements. Based on machine vision technology, the image recognition mechanism 3 automatically analyzes the digital image of the threaded hole through a series of preset algorithms and logic, thereby achieving non-contact judgment on whether there are any missing threads inside the threaded hole.

[0034] Reference Figure 2 and Figure 3 Since the thread is located inside the hole, the image recognition mechanism 3 cannot easily detect the thread profile inside the hole. Therefore, an auxiliary detection mechanism is also provided. The auxiliary detection mechanism includes a mounting plate 4, a screw-on assembly 5, a drive assembly 6, a connecting assembly 7, and a pressing assembly 8. The mounting plate 4 is fixedly connected to one side of the base 1 and is horizontally positioned. Multiple sets of screw-on assemblies 5 are provided, each corresponding to a threaded hole to be tested. In this embodiment, three sets of screw-on assemblies 5 are provided, corresponding to the three threaded holes to be tested on the workpiece 20, and the three sets of screw-on assemblies 5 are arranged at intervals in the horizontal direction; in other embodiments, the number of screw-on assemblies 5 may be more or less.

[0035] Reference Figure 4 and Figure 5The screw-in assembly 5 includes a turntable 51, a connecting rod 52, and a detection screw 53. The turntable 51 is rotatably mounted, with its axis of rotation horizontal. A cross-shaped slot 511 is coaxially formed on the turntable 51. The cross-section of the middle part of the connecting rod 52 is a cross shape that matches the slot 511, and both ends of the connecting rod 52 are cylindrical. The middle part of the connecting rod 52 slides through the slot 511 on the turntable 51. The detection screw 53 is located at the end of the connecting rod 52. Therefore, when the turntable 51 rotates, it can drive the connecting rod 52 and the detection screw 53 to rotate in the same direction, causing the end of the detection screw 53 to screw into the threaded hole to be tested on the workpiece 20. If the detection screw 53 can be screwed in smoothly, it indicates that the thread structure inside the threaded hole meets the requirements. If the detection screw 53 cannot be screwed in smoothly, it indicates that the threaded hole does not meet the requirements, and the workpiece 20 needs to be removed for repair or scrapping. Since the engagement assembly 5 is provided in three sets, it can simultaneously inspect the three threaded holes on the workpiece 20, thereby improving the inspection efficiency.

[0036] Reference Figure 2 and Figure 6 The pressing component 8 is located at the end of the connecting rod 52 away from the detection screw 53, and is used to drive the end of the detection screw 53 to press against the opening end of the threaded hole to be tested. The pressing component 8 includes a first power telescopic member 81, a connecting plate 82, a sleeve 83, and a second spring 84. The first power telescopic member 81 is a servo electric cylinder, so the movement of the output end is easy to control precisely. The length direction of the first power telescopic member 81 is parallel to the length direction of the connecting rod 52; the cylinder body of the first power telescopic member 81 is fixedly mounted on the mounting plate 4. The connecting plate 82 is horizontally arranged and vertically fixedly connected to the piston rod end of the first power telescopic member 81. The sleeve 83 is fixedly connected to the connecting plate 82. There are three sleeves 83, each corresponding to one of the three connecting rods 52; the three sleeves 83 are arranged at intervals along the length direction of the connecting plate 82, and the axial direction of the sleeves 83 is parallel to the length direction of the connecting rods 52. The end of the sleeve 83 near the connecting plate 82 is closed, and the end of the sleeve 83 away from the connecting plate 82 is open. One end of the connecting rod 52 extends into the inside of the sleeve 83, and the connecting rod 52 and the sleeve 83 can rotate relative to each other. Therefore, when the connecting rod 52 rotates, it will not drive the sleeve 83 to rotate, thus ensuring a stable connection between the connecting rod 52 and the sleeve 83.

[0037] Reference Figure 6Three second springs 84 are provided, each corresponding to one of the three sleeves 83. The second springs 84 are located inside the corresponding sleeves 83. One end of the second spring 84 is fixedly connected to the inner wall of the sleeve 83 near the connecting plate 82, and the other end of the second spring 84 is fixedly connected to a connecting block 841. A connecting disc 522 is fixedly connected to one end of the connecting rod 52 inside the sleeve 83. The connecting disc 522 is a circular disc, and its outer wall abuts against the inner wall of the sleeve 83. The connecting block 841 abuts against the connecting disc 522. A circular rotating block 8411 is coaxially fixedly connected to the connecting block 841. A rotating groove 5221 is provided on the connecting disc 522, and the rotating block 8411 is rotatably connected in the rotating groove 5221, making the connecting block 841 and the connecting disc 522 rotatably connected.

[0038] Therefore, in the initial state, the end of the detection screw 53 is spaced apart from the threaded hole to be tested. The piston rod of the first power telescopic member 81 extends, allowing the connecting plate 82 and sleeve 83 to slide horizontally. The sleeve 83, driven by the second spring 84, causes the connecting rod 52 and the detection screw 53 to slide horizontally until the end of the detection screw 53 abuts against the end of the threaded hole to be tested. At this point, the piston rod of the first power telescopic member 81 continues to extend, allowing the connecting plate 82 to continue moving the sleeve 83. The end of the detection screw 53 cannot move further, allowing the sleeve 83 to slide relative to the connecting rod 52. This compresses the second spring 84, which then applies pressure to the detection screw 53 through the connecting rod 52, thus pressing the end of the detection screw 53 against the opening of the threaded hole to be tested. This ensures that the detection screw 53 can smoothly screw into the threaded hole when it rotates, preventing it from rotating in place and affecting the accuracy of the test results.

[0039] The connecting block 841 is rotatably connected to the connecting plate 522. Therefore, when the connecting rod 52 rotates, the connecting plate 522 at the end of the connecting rod 52 can rotate relative to the connecting block 841 at the end of the second spring 84. This prevents the rotation of the connecting rod 52 from causing the second spring 84 to rotate, thus preventing the second spring 84 from being twisted and ensuring the normal use of the second spring 84.

[0040] Furthermore, a disc spring 831 is fixedly engaged on the inner wall of the end of the sleeve 83 away from the connecting plate 82. The disc spring 831 is sleeved on the outside of the connecting rod 52 and can abut against the connecting disc 522. When the end of the detection screw 53 is screwed into the threaded hole to be tested, the piston rod of the first power telescopic member 81 can be retracted, causing the connecting plate 82 to drive the sleeve 83 to slide away from the workpiece 20 until the disc spring 831 at the end of the sleeve 83 abuts against the connecting disc 522 at the end of the connecting rod 52. At this time, the movable end of the first power telescopic member 81 continues to retract, which can compress the disc spring 831, thereby applying a large outward pulling force to the connecting rod 52 and the detection screw 53 to verify the threaded connection effect. If the thread in the tested threaded hole meets the requirements, the testing screw 53, under tension, will remain in the threaded engagement state. If the thread in the tested threaded hole does not meet the requirements, the testing screw 53 will be easily pulled out due to insufficient thread engagement strength. Based on this phenomenon, it can be determined that the corresponding tested threaded hole has a defect, and the workpiece 20 needs to be picked out for rework or scrapped. The disc spring 831 can apply a large tension to the testing screw 53 even with slight deformation, and can reduce the adverse effects of rigid connection on the first power telescopic component 81, thus ensuring service life.

[0041] Reference Figure 2 and Figure 3 When the threaded hole to be tested meets the requirements, the testing screw 53 can be smoothly screwed into the threaded hole; when the threaded hole to be tested does not meet the requirements, the testing screw 53 cannot be smoothly screwed into the threaded hole. To facilitate observation of the actual movement of the testing screw 53, a marker 9 is provided at the same position on each connecting rod 52. In this embodiment, the marker 9 is a disc-shaped structure fixedly connected to the outer wall of the connecting rod 52, and the marker 9 is marked in red or other colors for easy observation by the operator. In other embodiments, the marker 9 can also be a colored coating applied to the outer wall of the connecting rod 52, thereby facilitating quick observation of the position of the end of the marker 9 by the operator.

[0042] Initially, the testing screws 53 are spaced apart on the outside of the threaded holes to be tested, and the end faces of the marking pieces 9 on the three connecting rods 52 are flush. During testing, the three testing screws 53 rotate synchronously. If all three threaded holes on the workpiece 20 meet the assembly requirements, the three testing screws 53 can be smoothly screwed into the three threaded holes respectively. When the testing screws 53 rotate, they will drive the connecting rods 52 and the marking pieces 9 to move along their own axes, so the three marking pieces 9 remain flush. When one of the threaded holes on the workpiece 20 has a defect, the corresponding testing screw 53 cannot be smoothly screwed into this threaded hole, so this testing screw 53 rotates in place, while the other two testing screws 53 are smoothly screwed in. This will cause one marking piece 9 to rotate in place, while the other two marking pieces 9 will move axially, so that the three marking pieces 9 are not on the same straight line. Therefore, when the inspector observes this phenomenon, it indicates that there is a defect in the threaded hole on the workpiece 20, which facilitates the operator to quickly determine whether the workpiece 20 is qualified or not.

[0043] Reference Figure 2 and Figure 3 The drive assembly 6 is mounted on the mounting plate 4 and is used to drive the turntable 51 to rotate. The drive assembly 6 includes a drive sprocket 61, a driven sprocket 62, a transmission sprocket 63, a chain 64, and a motor 65. The chain 64 is wound between the drive sprocket 61 and the driven sprocket 62. The output shaft of the motor 65 is parallel to the axis of the connecting rod 52. The output shaft of the motor 65 is coaxially connected to the drive sprocket 61, so the motor 65 can drive the chain 64 to rotate after starting. There are three transmission sprockets 63, each corresponding to a turntable 51. The transmission sprockets 63 are located inside the chain 64 and mesh with the chain 64. The transmission sprockets 63 are coaxially fixedly connected to the corresponding turntable 51; therefore, when the chain 64 rotates, it can drive the transmission sprockets 63 to rotate, thereby causing multiple turntables 51 to rotate and completing the screwing process of the detection screw 53. The motor 65 is a micro motor, which is convenient for installation.

[0044] Reference Figure 5Furthermore, a horizontal slide rail 10 is fixedly installed on the mounting plate 4, and a mounting base 11 is slidably installed on the top wall of the slide rail 10 along its length. The mounting base 11 has a horizontally arranged first screw hole, in which a first locking bolt 12 is threaded. The end of the first locking bolt 12 can abut against the slide rail 10, thus fixing the mounting base 11 to the slide rail 10. A receiving groove 111 is provided on the top wall of the mounting base 11, in which a lifting block 13 is vertically slidably connected. A horizontally arranged second screw hole is provided on the side wall of the mounting base 11, in which a second locking bolt 14 is threaded. The end of the second locking bolt 14 can abut against the lifting block 13, thus fixing the lifting block 13 to the mounting base 11. The device comprises five mounting bases 11. A motor 65 is fixedly connected to a lifting block 13 in one of the mounting bases 11, and a drive sprocket 61 is coaxially and fixedly connected to the output shaft of the motor 65. A driven sprocket 62 is rotatably connected to a lifting block 13 in another mounting base 11. Three turntables 51 are rotatably connected to lifting blocks 13 in the remaining three mounting bases 11. Therefore, the lateral mounting position and vertical mounting height of the drive sprocket 61, driven sprocket 62, and turntables 51 are all adjustable. This allows the device to remain applicable even when the relative position of the threaded hole to be measured on the workpiece 20 changes, thus expanding its applicability and enhancing its versatility.

[0045] Reference Figure 7 and Figure 8A connecting assembly 7 is disposed between the connecting rod 52 and the detection screw 53. The connecting assembly 7 includes a mounting block 71, a support rod 72, an adjusting rod 73, a first spring 74, a stop block 75, and a push rod 76. The mounting block 71 is disc-shaped and coaxially arranged with the detection screw 53; a cavity is provided inside the mounting block 71. The detection screw 53 is coaxially fixedly connected to the outer wall of the mounting block 71. A protrusion 16 is fixedly connected to the outer wall of the mounting block 71; the support rod 72 is arranged radially along the mounting block 71, and the support rod 72 passes through the mounting block 71 and the protrusion 16, such that one end of the support rod 72 is located in the cavity inside the mounting block 71, and the other end of the support rod 72 protrudes to the outside of the protrusion 16. The support rod 72 is slidably connected to the mounting block 71 along the tangential direction of the outer wall of the mounting block 71, and both the mounting block 71 and the protrusion 16 have sliding grooves 18 for the support rod 72 to slide. A protrusion 17 is fixedly connected to the outer wall of the protrusion 16; a stop block 75 is fixedly connected to the top wall of the protrusion 16, and the stop block 75 and the protrusion 17 are spaced apart. A guide rod 19 is fixedly connected between the stop block 75 and the protrusion 17, and the guide rod 19 is arranged along the tangential direction of the mounting block 71. One end of the support rod 72 located outside the protrusion 16 slides through the guide rod 19, thus improving the stability of the support rod 72 during the sliding process. An adjusting rod 73 is parallel to the support rod 72, and one end of the adjusting rod 73 passes through the guide rod 19; a first spring 74 is sleeved on the outside of the guide rod 19, and the first spring 74 is fixedly connected between the adjusting rod 73 and the support rod 72; the first spring 74 is in a compressed state, and the first spring 74 causes the support rod 72 to press against the stop block 75.

[0046] One end of the connecting rod 52 extends into the cavity inside the mounting block 71, and the connecting rod 52 and the mounting block 71 are rotatably connected. The push rod 76 is fixedly connected to the end of the connecting rod 52 that passes through the mounting block 71, and the push rod 76 is arranged radially along the connecting rod 52; multiple push rods 76 are provided and arranged in a circumferential array.

[0047] When the connecting rod 52 rotates, it will drive the push rod 76 to rotate in the same direction. When the threaded hole to be tested meets the requirements, the testing screw 53 can be smoothly screwed into the threaded hole to be tested. Therefore, the push rod 76 rotates counterclockwise, which will cause the push rod 76 to abut against the side of the support rod 72 near the stop block 75. Due to the action of the first spring 74, the push rod 76 is pressed against the support rod 72. At this time, the push rod 76 and the support rod 72 remain relatively stationary. Therefore, the push rod 76 will drive the support rod 72 to rotate. The support rod 72 drives the mounting block 71 to rotate in the same direction. The mounting block 71 drives the testing screw 53 to rotate in the same direction. At this time, the connecting rod 52 and the testing screw 53 remain relatively stationary, which allows the testing screw 53 to be smoothly screwed into the threaded hole to be tested.

[0048] When the threaded hole to be tested has a defect, the detection screw 53 cannot be screwed into the threaded hole smoothly. Therefore, when the push rod 76 rotates counterclockwise, it cannot drive the mounting block 71 to rotate. At this time, the rotation of the push rod 76 will push the support rod 72 to move, so that the first spring 74 is further compressed. After the support rod 72 moves a certain distance, the push rod 76 passes over the support rod 72, and the support rod 72 returns to its original position under the action of the first spring 74. Then the next push rod 76 pushes the support rod 72 to slide, and so on. That is, during this process, the connecting rod 52 continues to rotate counterclockwise, while the mounting block 71 and the detection screw 53 remain stationary, thereby preventing the motor 65 from overloading when the end of the detection screw 53 is screwed into the threaded hole to be tested and gets stuck, thus making it safer.

[0049] Reference Figure 8 Furthermore, the adjusting rod 73 slides along the length of the guide rod 19 and is mounted on the guide rod 19. A through hole is provided on the stop block 75, the axis of which is parallel to the axis of the guide rod 19. An adjusting bolt 751 passes through the through hole and is rotatably connected to it around its own axis. A third threaded hole is provided on the adjusting rod 73, and this hole is threadedly connected to the adjusting bolt 751. Therefore, under the constraint of the guide rod 19 on the adjusting rod 73, rotating the adjusting bolt 751 drives the adjusting rod 73 to move, thereby adjusting the distance between the adjusting rod 73 and the support rod 72. This changes the deformation of the first spring 74 and adjusts the elastic force on the support rod 72. This elastic force can be adjusted according to actual needs to correspond to different tightening forces, making it more convenient.

[0050] Reference Figure 5 One end of the connecting rod 52 near the detection screw 53 is coaxially fixedly connected to a limiting disk 521. There are two limiting disks 521 arranged at intervals. One limiting disk 521 is located in the internal cavity of the mounting block 71, and the other limiting disk 521 is located outside the mounting block 71. The two limiting disks 521 abut against the inner wall and outer wall of the mounting block 71, respectively. Therefore, on the one hand, it can improve the stability of the rotational connection between the connecting rod 52 and the mounting block 71, and on the other hand, it can make the connecting rod 52 and the mounting block 71 move axially together. If the threaded hole to be tested on the workpiece 20 meets the requirements, when the testing screw 53 is pressed against the open end of the threaded hole to be tested on the workpiece 20, the rotation of the turntable 51 will cause the connecting rod 52 to rotate. The connecting rod 52 pushes the mounting block 71 to rotate through the support rod 72. The mounting block 71 drives the testing screw 53 to rotate, and the testing screw 53 is screwed into the threaded hole to be tested. During the process of the testing screw 53 being screwed into the threaded hole, the testing screw 53 will move along its own axial direction. At this time, the testing screw 53 drives the mounting block 71 and the connecting rod 52 to move axially, so that the connecting rod 52 slides axially relative to the turntable 51. That is, the connecting rod 52 can slide axially while rotating, thereby ensuring the smooth progress of the testing process.

[0051] Furthermore, the detection screw 53 and the mounting block 71 are detachably connected. A connecting piece 531 is fixedly connected to the end of the detection screw 53, and the connecting piece 531 and the mounting block 71 are fixedly connected by fastening bolts. Therefore, it is convenient to replace detection screws 53 of different diameters or lengths, and it can be used to detect workpieces 20 with threaded holes of different sizes, thus broadening its applicability.

[0052] Reference Figure 1 The base 1 is also equipped with a pressing mechanism 15, which includes a third power telescopic component 151, a pressure plate 152, and a pressing block 153. The third power telescopic component 151 is a cylinder, and the cylinder body of the third power telescopic component 151 is fixedly installed on the base 1. The piston rod of the third power telescopic component 151 is vertically downward and fixedly connected to the pressure plate 152. The pressure plate 152 is horizontally arranged, and the pressing block 153 is fixedly connected to the bottom wall of the pressure plate 152. There are two pressing blocks 153 arranged at intervals.

[0053] During inspection, the parts can be initially assembled, and then the assembled workpiece 20 is placed on the top surface of the base 1. The workpiece 20 is then clamped and fixed by the second power telescopic component 21. Next, visual inspection and trial tightening of the inspection screw 53 are performed. When the threaded hole to be tested on the workpiece 20 meets the requirements, the third power telescopic component 151 can be activated. The piston rod of the third power telescopic component 151 extends, and the third power telescopic component 151 drives the pressure plate 152 and the pressure block 153 to move down, so that the pressure block 153 presses against the riveting parts at both ends of the workpiece 20, thereby completing the riveting between the parts and making them a whole to form the required product. Before riveting, if a quality defect is detected in the threaded hole to be tested on the workpiece 20, the part can be removed in time for repair or replacement, thereby reducing the scrap generated after riveting due to quality defects.

[0054] In this embodiment, the first power telescopic member 81 is a servo electric cylinder, thus facilitating precise control of the moving distance of the movable end of the first power telescopic member 81. The second power telescopic member 21 and the third power telescopic member 151 are both pneumatic cylinders; in other embodiments, hydraulic cylinders or electric push rods 76 may also be used.

[0055] The implementation principle of a visual tapping inspection device for automotive headlight assemblies according to an embodiment of this application is as follows: The workpiece 20, after preliminary assembly of various parts, is placed on a base 1. Then, the piston rods of the two second power telescopic components 21 move towards each other, and the workpiece 20 is fixed by clamping the two sides of the workpiece 20 with two clamping blocks 22. Next, visual inspection is performed by an image recognition mechanism 3. If the threaded hole on the workpiece 20 has no threads, or the diameter of the threaded hole is significantly too large or too small, or there is a lack of threaded holes, a warning signal can be issued in a timely manner, and then the workpiece 20 is removed. If the threaded hole on the workpiece 20 roughly meets the requirements, the threads inside the threaded hole can be further inspected by an auxiliary inspection mechanism.

[0056] When the auxiliary testing mechanism is used for testing, the movable end of the first power telescopic component 81 extends, causing the connecting plate 82 to drive the sleeve 83 to move closer to the workpiece 20. The sleeve 83 drives the connecting rod 52 and the testing screw 53 to move through the second spring 84 until one end of the testing screw 53 abuts against the open end of the threaded hole to be tested on the workpiece 20. As the sleeve 83 continues to move, the second spring 84 is compressed, causing the end of the testing screw 53 to press against the open end of the threaded hole to be tested on the workpiece 20.

[0057] Then, motor 65 starts, and with the cooperation of drive sprocket 61 and driven sprocket 62, chain 64 rotates, causing multiple transmission sprockets 63 to rotate; transmission sprockets 63 drive turntable 51 to rotate, and turntable 51 drives connecting rod 52 to rotate. When all three threaded holes on workpiece 20 meet the requirements, connecting rod 52 drives detection screw 53 to rotate synchronously, so that detection screw 53 can be smoothly screwed into the threaded hole to be tested. At this time, the markings 9 on the three connecting rods 52 move synchronously and are always on the same straight line. When this phenomenon is observed, the threaded hole to be tested can be further inspected. During the inspection, the movable end of the first power telescopic member 81 is retracted, causing the sleeve 83 to move away from the workpiece 20 until the disc spring 831 on the sleeve 83 abuts against the connecting plate 522 at the end of the connecting rod 52. At this time, the sleeve 83 continues to move outward, which can apply an outward pulling force to the connecting rod 52 and the detection screw 53. If the detection screw 53 is still in the engaged state, it indicates that the threaded hole to be tested is qualified. If the detection screw 53 is pulled out, it indicates that the threaded hole to be tested has a defect.

[0058] After the above-mentioned pull-out test is completed, the sleeve 83 is moved slightly closer to the end of the workpiece 20, so that the disc spring 831 returns to its initial state without compression. Then, the output shaft of the motor 65 rotates in the reverse direction, causing the detection screw 53 to rotate in the reverse direction, thus unscrewing the detection screw 53 from the threaded hole to be tested. Then, the piston rod of the third power telescopic component 151 extends, driving the pressure block 153 to move, thereby completing the riveting process of the workpiece 20 and forming the desired product. Next, the piston rod of the third power telescopic component 151 retracts, moving the pressure block 153 away from the workpiece 20; the piston rod of the second power telescopic component 21 retracts, releasing the clamping of the workpiece 20, and then the tested and riveted product can be taken out.

[0059] In addition, during the auxiliary inspection process, when there is a quality defect in the threaded hole on the workpiece 20, the defective threaded hole will prevent the corresponding inspection screw 53 from being screwed in smoothly. Therefore, during the rotation of the turntable 51, the corresponding number of inspection screws 53 will rotate in place. At this time, the marking piece 9 at the end of the corresponding connecting rod 52 will also rotate in place. Therefore, after observing this phenomenon, it indicates that there is a defect in the threaded hole on the workpiece 20, which needs to be repaired or replaced before the subsequent riveting process can be carried out. Thus, the above equipment can quickly complete the inspection of the threaded hole on the workpiece 20, thereby ensuring product quality.

[0060] The above are optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A visual inspection device for automotive lighting components, characterized in that: Includes a base (1) and a positioning mechanism (2) disposed on the base (1) for fixing the workpiece (20); Image recognition mechanism (3) is used to detect threaded holes on workpiece (20); The auxiliary testing mechanism includes a mounting plate (4), a screw-in assembly (5), a drive assembly (6), a connecting assembly (7), and a pressing assembly (8). The engagement assembly (5) includes a turntable (51), a connecting rod (52), and a detection screw (53). The turntable (51) is rotatably connected to the mounting plate (4). The connecting rod (52) is coaxially slidably inserted into the turntable (51). The detection screw (53) is coaxially disposed at the end of the connecting rod (52) so that the turntable (51) can drive the connecting rod (52) and the detection screw (53) to rotate in the same direction, and so that the detection screw (53) is screwed into the threaded hole to be tested on the workpiece (20). The drive assembly (6) is used to drive the turntable (51) to rotate; The connecting component (7) is disposed between the connecting rod (52) and the detection screw (53) so that when the detection screw (53) and the threaded hole to be tested are normally engaged, the connecting rod (52) and the detection screw (53) rotate in the same direction and remain relatively stationary. When the detection screw (53) cannot be screwed into the threaded hole to be tested, the connecting rod (52) rotates relative to the detection screw (53). The pressure assembly (8) is used to drive the detection screw (53) to slide towards the side of the threaded hole to be tested.

2. The visual inspection device for automotive headlight assemblies according to claim 1, characterized in that: The engagement assembly (5) is provided in multiple sets, and each engagement assembly (5) corresponds to a threaded hole to be tested. The drive assembly (6) includes a drive sprocket (61), a driven sprocket (62), a transmission sprocket (63), a chain (64), and a motor (65). The chain (64) is wound between the drive sprocket (61) and the driven sprocket (62). The output shaft of the motor (65) is coaxially connected to the drive sprocket (61). The number of transmission sprockets (63) is the same as the number of engagement assemblies (5). Each transmission sprocket (63) corresponds to one engagement assembly (5). The transmission sprocket (63) is located inside the chain (64) and meshes with the chain (64). The transmission sprocket (63) is coaxially fixedly connected to the turntable (51).

3. The visual inspection device for automotive headlight assemblies according to claim 2, characterized in that: The connecting assembly (7) includes a mounting block (71), a support rod (72), an adjusting rod (73), a first spring (74), a stop block (75), and a push rod (76). The mounting block (71) is fixedly disposed at the end of the detection screw (53). The support rod (72) is radially disposed along the mounting block (71) and slidably connected to the mounting block (71) along the outer wall of the mounting block (71). The mounting block (71) has a cavity inside. One end of the connecting rod (52) passes through the interior of the mounting block (71). The push rod (76) is fixedly connected to the mounting block (71). The connecting rod (52) is inserted into the mounting block (71) at one end; one end of the support rod (72) is located inside the mounting block (71) and is used to abut against the push rod (76); the other end of the support rod (72) is located outside the mounting block (71); the adjusting rod (73) and the stop block (75) are both located outside the mounting block (71); the first spring (74) is connected between the adjusting rod (73) and the support rod (72); the first spring (74) causes the support rod (72) to abut against the stop block (75).

4. The visual inspection device for automotive headlight assemblies according to claim 3, characterized in that: The adjusting rod (73) is slidably connected to the outside of the mounting block (71) along the sliding direction of the support rod (72). An adjusting bolt (751) is rotatably connected to the stop block (75). The adjusting bolt (751) is set along the sliding direction of the support rod (72). The adjusting bolt (751) is threadedly connected to the adjusting rod (73).

5. The visual inspection device for automotive headlight assemblies according to claim 3, characterized in that: The detection screw (53) and the mounting block (71) are detachably connected.

6. The visual inspection device for automotive lighting components according to claim 2, characterized in that: The pressure-retaining component (8) includes a first power telescopic member (81), a connecting plate (82), a sleeve (83), and a second spring (84). The connecting plate (82) is connected to the movable end of the first power telescopic member (81), and the sleeve (83) is connected to the connecting plate (82). The number of sleeves (83) is the same as the number of connecting rods (52), and each sleeve (83) corresponds to one connecting rod (52). The second spring (84) is located inside the sleeve (83). One end of the second spring (84) is provided with a connecting block (841). The connecting block (841) is rotatably connected to the connecting rod (52), and the other end of the second spring (84) is connected to the sleeve (83).

7. The visual inspection device for automotive headlight assemblies according to claim 6, characterized in that: The sleeve (83) is slidably sleeved on the outside of the connecting rod (52) at one end away from the connecting plate (82). A disc spring (831) is provided at one end of the sleeve (83) away from the connecting plate (82). The disc spring (831) is sleeved on the outside of the connecting rod (52). A connecting disc (522) is provided at one end of the connecting rod (52) inside the sleeve (83) and abuts against the inner wall of the sleeve (83). The disc spring (831) is used to abut against the connecting disc (522).

8. The visual inspection device for automotive headlight assemblies according to claim 6, characterized in that: Each of the connecting rods (52) is provided with a marker (9) at the same position.

9. The visual inspection device for automotive headlight assemblies according to claim 2, characterized in that: The mounting plate (4) is provided with a mounting seat (11) that slides parallel to its own surface. The mounting seat (11) is provided with a first locking bolt (12) for locking the mounting seat (11). The mounting seat (11) is provided with a lifting block (13) that slides along its own height direction. The mounting seat (11) is provided with a second locking bolt (14) for locking the lifting block (13). The turntable (51), the driving sprocket (61), and the driven sprocket (62) are all rotatably connected to the lifting block (13).

10. The visual inspection device for automotive headlight assemblies according to claim 1, characterized in that: The positioning mechanism (2) includes two second power telescopic members (21) located in the same straight direction, with the movable ends of the two second power telescopic members (21) facing each other.

Images